These articles include recent research on ways to incorporate the noncognitive side of ability in economic theory and to empirically assess and explain its role in labor market and behavioral outcomes. Contributions investigate the extent to which assignment of workers is determined by traditional cognitive variables and by personality traits. Also presented in this collection is research on the role of noncognitive skills in explaining the labor market position of underrepresented groups and research that integrates the economic and psychological theory and evidence on noncognitive skills.